I have the exact same problem with CS5. It seems to download the updates but fails to install them. Does anyone have a possible solution?
Please provide us with the following logs:
You can find them at:
Program Files(x86)\Common Files\Adobe\Installers
/Volumes/%Volume Name%/Users/%Username%/Library/Application Support/Adobe/AAMUpdater/1.0
You can zip all the files together and send us through mail. This would help us in finding the root cause.
Appreciate your help. Apologize for the inconvenience.